We eliminated benches to reduce the rate at which the problematic homeless cross paths with the complainers.
The DPW as an organization doesn't give a shit about how many commuter's asses a bench serves from 6am to 8pm. It just knows that every day when Karen sees a homeless man sleeping on that bench at 5AM she submits a complaint from the web form.
From their stupid "not my job, I just solve tickets" keyhole view of the situation removing the benches makes the problem smaller and they will iterate on that until complaint equilibrium is reached.